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### Toggle Clamping Mechanism Formula and Calculator

Machine Design Application, Equations and Calculators

Toggle Mechanism Clamping Ninety Degree Reaction Points Design Formula and Calculator

Preview: Clamping Ninety Degree Reaction Points Toggle Mechanism Calculator

*
Eq. 1
Q = P [ ( l + l _{3} · f + 0.06 · r · f_{o} ) / ( l_{1} - l_{2 } · f_{1} - 0.40 · r · f_{o} ) ] *

*Eq. 2
P = Q / [ ( l + l _{3} · f + 0.06 · r · f_{o} ) / ( l_{1} - l_{2 } · f_{1} - 0.40 · r · f_{o} ) ] *

Figure 1

Clamping Ninety Degree Reaction Points Design

Where:

Q = force applied to handle. lbf, (N)

P =
clamping force, lbf. (N)

*f* = coefficient of friction of contact surface = 0.1 to 0.15

* f _{o}* = coefficient of friction (axles and pivot pins) = 0.1 to 0.15

*f*= coefficient of friction of contact surface = 0.1 to 0.15

_{1}*n*= efficiency coefficient, 0.98 to 0.84

*l, l*= length as indicated. in, (mm)

_{1}l_{2}l_{3}r = radius of pivot hole. in, (mm)

Reference:

Handbook of Machining and Metalworking Calculations

Ron A. Walsh

2001

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